diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index dcdc1f4..eab5e11 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -118,10 +118,10 @@ struct toshiba_acpi_dev {
 	int last_key_event;
 	int key_event_valid;
 
-	int illumination_supported:1;
-	int video_supported:1;
-	int fan_supported:1;
-	int system_event_supported:1;
+	unsigned int illumination_supported:1;
+	unsigned int video_supported:1;
+	unsigned int fan_supported:1;
+	unsigned int system_event_supported:1;
 
 	struct mutex mutex;
 };